Html 5 is now the King of markup!
I think that part of being a good web developer is obviously to stay up to date with new technology and keeping the standards of the web as high as possible.
With the release of HTML 5 not so long ago, its time every html developer got to grips with this wondrous language!
So here is a link to some awesome html 5 tutorials.
http://coding.smashingmagazine.com/2009/08/04/designing-a-html-5-layout-from-scratch/
